National Aeronautics and Space Administration 1 CCSDS Information Architecture Working Group Daniel J. Crichton NASA/JPL 24 March 2005

National Aeronautics and Space Administration 2 IAWG Charter F The focus of this working group is to define a reference Space Information Architecture that encompasses the capture, management and exchange of data for both flight and ground environments across the operational mission lifecycle. F Goals: 1. Define a reference end-to-end space information architecture for interoperability and cross-support that encompasses both flight and ground data system operations and provides a common framework for use by standards and systems developers. The reference space information architecture includes: a. standard functional components for information management b. definition of standard interfaces for information management c. standards in information representation d. standards in defining information processes 2. Define and leverage common methods for representing information architectural views; and 3. Address application layer information management issues including application protocols and data handling and ensure that they are dealt with in a clear and consistent way throughout the end-to-end system; and 4. Work with the SEA System Architecture and MOIMS WGs

A View of a Space Data System Information Architecture Cross Support Services Spacecraft Onboard Interface Services Space Internetworking Services Space Link Services Mission Operations and Information Management Services Commodity Communications & Navigation Systems Systems Engineering Source: A. Hooke, NASA/JPL Information Architecture Long term – End-to-End Integration NEAR TERM Science Data Systems  Common Info Models  Repositories  Registries Ground Systems  Common Info Models  Product Services  Registries

National Aeronautics and Space Administration 4 F Deliverables ä Space Information Architecture F Status: White Book, under review by agencies (NASA, CNES, ESA) F Feedback from JPL, CNES, ESA and GSFC F Publication: As a CCSDS technical document integrating results of Spring 2005 CCSDS Meetings in Greece. ä Information Architecture and Grid Comparison Study F Status: White paper published for Fall Toulouse Meeting F Benefits ä Cross-supported information services ä Data interoperability across agencies, missions ä Software architectural principles and styles for Space Data Systems ä Validation of architecture found in several deployed systems across agencies F Importance is to head off those at the pass that aren’t adopting “best practice” approaches in building data management systems IAWG Work Overview

National Aeronautics and Space Administration 5 Status of WG F Information Architecture White Book – March 2005 Version ä Major updates since Fall CCSDS Meetings ä Integrated CNES OMG MDA concepts ä Will be reviewed in Athens F Ontology developed based on white book. Captured in Protégé F Paper mapping CCSDS IA and Grid Concepts/Projects F Initial discussions between GSFC and JPL to look at jointly working together between IA and IPR to focus on registries efforts

National Aeronautics and Space Administration 6 Technical Approach (Information View) 1. Information Objects 2. Information Models 3. Meta Models

National Aeronautics and Space Administration 7 Data and Metadata Objects F Data Objects: represent the data as is physically present using a sequence of bits ä Without a metadata object the utility is decreased. No data structure is known… F Metadata Objects: special class of data objects that describe the structure, (syntactic) validity, interrelationships, and (semantic) rules of a data object and its respective structural elements.

National Aeronautics and Space Administration 8 Technical Approach Mission Planning Mission Analysis Monitor & Control Directive Generation Data Acquisition Directive Management Domain Data Models Local Data Models Repository Service Registry Service Query Service Product Service Common Schema & Dictionaries Representative Functional Objects Information Management Functional Objects Metadata / Resources Data Objects Query / Results

National Aeronautics and Space Administration 9 Advanced Information Management Objects Types F Repository Service Objects ä DSO + non-functional properties (scalability, uniformity, dependability) F Registry Service Objects ä Interface to retrieve metadata objectsbased on a metadata query F Product Service Objects ä Repository service object + a query object + an element of domain processing or transformation F Archive Service Objects ä Responsible for ingestion of data objects into a repository, and ingestion of metadata objects into an accompanying registry F Query Service Objects ä Manages routing of queries in order to discover and locate the appropriate product service objects, as well as repository service objects

National Aeronautics and Space Administration 10 Return on Investment F Background ä In the absence of information system standards, we have seen the development of space data systems, and information systems which are not interoperable F Previous Method ä Construct “one-off” systems which work, but cannot be leveraged for future systems F Architecture is not well-defined, or well-documented F Information Interchange is performed “ad-hoc” F New Method ä Establish Information Architecture Standards to be used within the Space Data Systems context ä Identify mapping of architecture (components and connectors) to the end-to-end mission architecture F Benefit ä Interoperable Systems ä Improved Mission Design, and small time-to-build, and resource requirements for constructing large-scale, space data systems ä Reusable code and methodologies ä Reuse of data and facilities across mission sets ä Automated interfaces across pipeline

National Aeronautics and Space Administration 11 Key FY04 Accomplishments AreaDescription Information ArchitectureChaired Spring and Fall CCSDS SEA IA Meetings; Developed and published CCSDS Space Info Architecture White Book. Information ArchitectureDeveloped white paper on Data Grid and IA architectures. Worked with PDS, DSMS, MIPL, SPASE, PO.DAAC on understanding their architectures. Validate architectural model through prototypes of core components (metadata registry, service registry, product service, etc) and science product information model. Information ArchitectureDeveloped Ontology Model for IA; developed Ontology Model for RASDS

National Aeronautics and Space Administration 12 FY05 Planned Accomplishments AreaDescriptionDate IAWGHold SEA IAWG MeetingApril 2005 IPR/IAWGJoint Meeting on Registries with IPR April 2005 IPR/IAWGGSFC/JPL TIMJune 2005 IAWGPublish current whitebook as a technical document for CCSDS (green book) August 2005 IPR/IAWGPublish joint white paper on registries with IPR September 2005

National Aeronautics and Space Administration 13 US Position F IPR and IA come together to work on registries F Setup technical interchange meetings with GSFC to ensure their contribution to IA and JPL’s contribution to IPR F Deliver IA as a technical document (green book) F Jointly focus on development of standards and prototyping for critical information management components ä Registries ä Repositories F Need to work on meeting schedule to ensure that the right NASA folks are available for the appropriate meetings. In particular, IA and IPR.